@misc{the+effect+of+changing+loads+on+the+deflection+of+rc+beams+reinforced+with+ribbed+bars, author = {Furtak, Kazimierz}, title = {The effect of changing loads on the deflection of RC beams reinforced with ribbed bars}, journal = {Technical Transactions}, address = {Kraków}, publisher = {Wydawnictwo PK}, date = {2018}, number = {Vol. 115, iss. 11} }